Thomas m



T. M. CONDON.

m. w APPLICATION FILED IULY Na |9I9.v

Patentd .9,1919.

particularly of the electrically operated type. and anl object of theinvention is to THOMAS M. CONDON, OF VALLEY CITY, NORTH DAKOTA.

FAN.

specification of Letters Patent.

Patented Dec. 9, 1919.

Applicationnled July 14, 1919. Serial No. 310,574.

T 0 all whom 'it may concc'n:

Be it known that I, THOMAS M. Cox'oox, a citizen of the United States,residing at Valley City, in 'the county of Barnes and State ofXorthDakota, have invented certainnew and useful Improvements in Fans, ofwhich thefollowing is a specification, reference being had to theac-companying drawings.

This invention rclates to an improved fan,

provide a fan of this kind, which, when in motion will throw a blast ofair covering a radius of from one hundred to one hundred and sixtydegree angle, instead of throwing a straight current of airsubstantially directly in front of the fan, as is accomplished by theordinary fan, thus eliminating the necessity of mounting the fan torevolve on an arcuate curve. I w

A further object of the invention is to provide a fan of this kindhaving blades curved outwardly and rea-rwardly, the end portions of theblades being of greater curves than the hodies of the blades, therebyeliminating the straight blades, so as to discharge or throw a currentof air of :a wide area. vWhile it has been found that a current of airfrom a fan of this kind may not be as strong as emanating from theordinary straight bladed fans, it will be a steady current, covering,considerable area.

A further object of the invention is to provide a fan wheel havingcurved blades of the kind heretofore mentioned, and meansfor pirotallymounting the blades in coperative connection with'the revolving shaft ofthe fan motor, in combination with means carried by the shaft,coperating with the connecting ends of the blade's for adjusting theblades, so as to regulate the positions. of the blades, therebygoverning the area of the current of air, as well as regulating theangle of the current of air.

A further object of the invention is the provision of means for changingthe. dispoy sition of the blades, that is changing all the bladescorrespondingly or changing the blades at different angles, whereby thecurrent of air may be altered -as may be found necessary.

'Vhile the design and construction at present illustrated 'and setlforth is deemed preferable, it is obvious that as a result of areduction of the invention to a more prac- 'tical form for commercialpurposes, the invcntion may be susccptible to changes, and the rightA tothese changes is claimed, provided they are' comprehended within thescope of what is -claimed The invention comprises further features andcombination'of parts, as will be hereinafter set forth, shown in thedrawings and claimed.

In the drawings:

' Figure 1 is a plan view of. an electrically operated fan constructedin accordance with the invention, showing the blades Curved, and themeans for adjusting the blades at different angles, ,as shown in dottedlines and in full lines.

Fi Qis 'a sectional 'plan view, thereby ,showing the detail constructionof the.. ad-

justing means, showing the blades adjusted at angles different to thoseshown in full and dotted lines inlFig. 1. Fig. 3 is a front view ofFig. 1. Fig. 4 is a sectional plan view of a .modified construction ofthe adjusting means for the blades, in which case only two blades arelused.

Fig. 5 is a. plan view of an electrically operated fan, showing the'adjusting means for the blades eliminated.

Referring more .especially to the drawings,

1 designates a convent-ional form of electric' motor, adapted for use inconnection with electric fans, for Operating the fan Wheels. This motoris provided with the usual loraid covered conductors, in the form of acord, as shown at 2, and rovided with a plug 8, to

` engage a socket not shown), whereby electrical energy' may be suppliedto the motor. The'shaft -l of the motor at' its outer end portion isprovided With a threaded bore 5.

cent ends fastened at'28 to the hub 29,-

through-which the screw 30 extends. A nut 31 is threaded upon the screw30, so as to coperate with the head of the screw, to

'hold the hub in different adjusted positionsI I By loosening the nut 31and adjusting the screw axially through the shaft 4, the blades may beadjusted in different angles. For

i instance, When the head is'moved, axially in a direotion with thesh'aft 11, the blades will move slightly radially, in which case thecurrent of air emanating fro'm the blades will' be thrown in a smallerarea than when -may be tightened. By adjusting the screw axially fromthe shaft 4, the outer ends of the blade will be moved farther rearward,and in this casethe area of the current of air Will be increased. Thefan blades` 12 are curved outwardly |and rearwardly as shown, the outerportions. of the blades being curved greater than the body portions, sothat When the blades are in motion, they Will throw 'a current of a'irof a wide range, that is of a wide area, more so than the ordinary fixedfan wheel,

Beyond the rectangular part 6 a eylindrical reduced extension 13 isformed, which is engaged by a dished Washer plate 14, there being a nut'15 threaded upon the extension 13, thereby holding the. plates 7, 8 and14 securely clamped together.

As shown in Fig'. L1, a screw l'threads into the bore 5, and is providedwith a head 17.

' This screW passes through the slots 18 of the 'arms of the fan.blades.

inner adj acent overlapping ends of .the short Interposed between theadjacent overlapping ends is a pair of nuts 19 and 20. The nut 19coperates With the head 17 of` the screw, for olamping the inner end ofcertain ofthe blades, say for instance one of the blades, Wh'ile the nut20 coperates with an additional nut 21, for holding the innel` arm of acertairr'other blade in a different position to the position of theother blade; By this construction, it will be seen that the-blades maybe arran ed at various angles relative to each other. owever, if desred,the blades may be adjusted at corresponding angles relative to eachother, by loosening upon the various nuts, and rotating the screwinwardly through the bore of the shaft, after which the nutl maybetightened, to hold the blades in osition. By adjusting the angles of thebll ades, and owing 'to the blades being curved `as shown, the

blades will throw a current of air of a Wide area.

In Fig. 5, themeans for .djusting the blades is eliminated, and inste. dthe blades are mounted upon a hub 22, which is mountl ed on therectangular part 23, there being opposing plates 24, to hold the hub 22in position and 'a nut 25 is threaded upon the reduced cylindrical andthreaded extension 26, to hold the parts in place. In this constructionof device, the blades are curved, as in the previous instance, the endsof the blades being curved greater than the bodies of the blades, so asto throw a current of air a wide area.

It is to be understood that this particular construction of fan bladeand means for adjusting the blade, may be applied to any form ofelectric fan, even those that are suspended from the ceiling and areoperated by slow motors, so that the blast of air when descending willspread considerably.

The invention having been set forth, what i is claimed as new and useful1s:

through -the hub and being a'djustable axi-z ally relatively to the.shaft. and connected thereto, whereby the bladesmay beadjusted atdifferent angles. i

VIn testimony Jwhereof I hereunto afiix my V signaturefin'the presenceof two witnesses.

p THOMAS M. ooNDoN. Witnesses: M. J. ENGHART,

J OSEPHINE EFTELAND..

